Wave Set Up

MARITIME – METEOROLOGY & EA TATE CALCULATOR Wave Set Up A precise tool.
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What is the Wave Set Up & How does it work?
Wave set‑up is the quasi‑steady increase in mean water level that occurs as waves approach a shoreline. It results from the conversion of wave momentum into a pressure gradient, a process described by the radiation‑stress theory of Longuet‑Higgins and Stewart. In shallow water the dominant contribution to set‑up can be expressed with a simple relationship that links the significant wave height Hs and the local water depth h. This approximation assumes linear wave theory and neglects frictional losses, making it useful for quick engineering estimates. The resulting set‑up height Ξ·0 adds to the tide and any existing sea‑level rise, and therefore must be considered when designing coastal defenses, harbours, and navigation channels.
\eta_0 = \frac{H_s^2}{8 h}
\eta_0 = wave set‑up height (m), H_s = significant wave height (m), h = water depth at the point of interest (m)
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Frequently Asked Questions
What is wave set-up in maritime navigation?
Wave set-up is the increase in mean water level near a shoreline as waves approach, caused by wave momentum converting to pressure gradient.
How does wave set-up affect maritime navigation?
It can lead to higher than expected water levels at the shore, affecting boat docking, flooding risks, and coastal erosion.
What factors are considered in calculating wave set-up?
The calculation typically considers significant wave height (Hs) and local water depth (h), assuming linear wave theory.
Can wave set-up be predicted accurately?
Predictions can be made using the radiation-stress theory, but accuracy depends on factors like water depth and wave conditions.
What is the significance of significant wave height in wave set-up calculations?
Significant wave height (Hs) is a key parameter that influences the magnitude of wave set-up near the shoreline.
How does water depth affect wave set-up?
In shallow water, the relationship between significant wave height and local water depth becomes more dominant in determining wave set-up.
Are there any limitations to using this wave set-up calculator?
Yes, the calculator assumes linear wave theory and neglects frictional losses, which may affect accuracy in certain conditions.

Results are for informational purposes only and do not constitute professional advice.